build,cli: replace libedit with bubbline

Release justification: n/a will not merge before stability ends

Release note (cli change): The engine used as line editor in the
interactive shell (`cockroach sql`, `demo`) has been updated. It
includes numerous bug fixes and new features.

.gitmodules

@@ -10,9 +10,6 @@
 [submodule "c-deps/krb5"]
 	path = c-deps/krb5
 	url = https://github.com/cockroachdb/krb5.git
-[submodule "c-deps/libedit"]
-	path = c-deps/libedit
-	url = https://github.com/cockroachdb/libedit.git
 [submodule "c-deps/geos"]
 	path = c-deps/geos
 	url = https://github.com/cockroachdb/geos.git

Makefile

@@ -474,7 +474,6 @@ C_DEPS_DIR := $(abspath c-deps)
 JEMALLOC_SRC_DIR := $(C_DEPS_DIR)/jemalloc
 GEOS_SRC_DIR     := $(C_DEPS_DIR)/geos
 PROJ_SRC_DIR     := $(C_DEPS_DIR)/proj
-LIBEDIT_SRC_DIR  := $(C_DEPS_DIR)/libedit
 KRB5_SRC_DIR     := $(C_DEPS_DIR)/krb5
 
 # Derived build variants.
@@ -494,11 +493,9 @@ endif
 JEMALLOC_DIR := $(BUILD_DIR)/jemalloc
 GEOS_DIR     := $(BUILD_DIR)/geos
 PROJ_DIR     := $(BUILD_DIR)/proj
-LIBEDIT_DIR  := $(BUILD_DIR)/libedit
 KRB5_DIR     := $(BUILD_DIR)/krb5
 
 LIBJEMALLOC := $(JEMALLOC_DIR)/lib/libjemalloc.a
-LIBEDIT     := $(LIBEDIT_DIR)/src/.libs/libedit.a
 LIBPROJ     := $(PROJ_DIR)/lib/libproj$(if $(target-is-windows),_4_9).a
 LIBKRB5     := $(KRB5_DIR)/lib/libgssapi_krb5.a
 
@@ -515,7 +512,6 @@ LIBGEOS     := $(DYN_LIB_DIR)/libgeos.$(DYN_EXT)
 
 C_LIBS_COMMON = \
 	$(if $(use-stdmalloc),,$(LIBJEMALLOC)) \
-	$(if $(target-is-windows),,$(LIBEDIT)) \
 	$(LIBPROJ)
 C_LIBS_SHORT = $(C_LIBS_COMMON)
 C_LIBS_OSS = $(C_LIBS_COMMON)
@@ -561,13 +557,11 @@ CGO_PKGS := \
 	pkg/cli/clisqlshell \
 	pkg/server/status \
 	pkg/ccl/gssapiccl \
-	pkg/geo/geoproj \
-	vendor/github.com/knz/go-libedit/unix
-vendor/github.com/knz/go-libedit/unix-package := libedit_unix
+	pkg/geo/geoproj
 CGO_UNSUFFIXED_FLAGS_FILES := $(addprefix ./,$(addsuffix /zcgo_flags.go,$(CGO_PKGS)))
 CGO_SUFFIXED_FLAGS_FILES   := $(addprefix ./,$(addsuffix /zcgo_flags_$(native-tag).go,$(CGO_PKGS)))
 BASE_CGO_FLAGS_FILES := $(CGO_UNSUFFIXED_FLAGS_FILES) $(CGO_SUFFIXED_FLAGS_FILES)
-CGO_FLAGS_FILES := $(BASE_CGO_FLAGS_FILES) vendor/github.com/knz/go-libedit/unix/zcgo_flags_extra.go
+CGO_FLAGS_FILES := $(BASE_CGO_FLAGS_FILES)
 
 $(BASE_CGO_FLAGS_FILES): Makefile build/defs.mk.sig | bin/.submodules-initialized
 	@echo "regenerating $@"
@@ -579,17 +573,7 @@ $(BASE_CGO_FLAGS_FILES): Makefile build/defs.mk.sig | bin/.submodules-initialize
 	@echo 'package $(if $($(@D)-package),$($(@D)-package),$(notdir $(@D)))' >> $@
 	@echo >> $@
 	@echo '// #cgo CPPFLAGS: $(addprefix -I,$(JEMALLOC_DIR)/include $(KRB_CPPFLAGS))' >> $@
-	@echo '// #cgo LDFLAGS: $(addprefix -L,$(JEMALLOC_DIR)/lib $(LIBEDIT_DIR)/src/.libs $(KRB_DIR) $(PROJ_DIR)/lib)' >> $@
-	@echo 'import "C"' >> $@
-
-vendor/github.com/knz/go-libedit/unix/zcgo_flags_extra.go: Makefile | bin/.submodules-initialized
-	@echo "regenerating $@"
-	@echo '// GENERATED FILE DO NOT EDIT' > $@
-	@echo >> $@
-	@echo 'package $($(@D)-package)' >> $@
-	@echo >> $@
-	@echo '// #cgo CPPFLAGS: -DGO_LIBEDIT_NO_BUILD' >> $@
-	@echo '// #cgo !windows LDFLAGS: -ledit -lncurses' >> $@
+	@echo '// #cgo LDFLAGS: $(addprefix -L,$(JEMALLOC_DIR)/lib $(KRB_DIR) $(PROJ_DIR)/lib)' >> $@
 	@echo 'import "C"' >> $@
 
 # BUILD ARTIFACT CACHING
@@ -659,19 +643,6 @@ $(PROJ_DIR)/Makefile: $(C_DEPS_DIR)/proj-rebuild | bin/.submodules-initialized
 	rm -rf $(PROJ_DIR)
 	mkdir -p $(PROJ_DIR)
 	cd $(PROJ_DIR) && cmake  $(xcmake-flags) $(PROJ_SRC_DIR) -DCMAKE_BUILD_TYPE=Release -DBUILD_LIBPROJ_SHARED=OFF
-
-$(LIBEDIT_SRC_DIR)/configure.ac: | bin/.submodules-initialized
-
-$(LIBEDIT_SRC_DIR)/configure: $(LIBEDIT_SRC_DIR)/configure.ac
-	cd $(LIBEDIT_SRC_DIR) && autoconf
-
-$(LIBEDIT_DIR)/Makefile: $(C_DEPS_DIR)/libedit-rebuild $(LIBEDIT_SRC_DIR)/configure
-	rm -rf $(LIBEDIT_DIR)
-	mkdir -p $(LIBEDIT_DIR)
-	@# NOTE: If you change the configure flags below, bump the version in
-	@# $(C_DEPS_DIR)/libedit-rebuild. See above for rationale.
-	cd $(LIBEDIT_DIR) && $(LIBEDIT_SRC_DIR)/configure $(xconfigure-flags) --disable-examples --disable-shared
-
 # Most of our C and C++ dependencies use Makefiles that are generated by CMake,
 # which are rather slow, taking upwards of 500ms to determine that nothing has
 # changed. The no-op case is the common case, as C and C++ code is modified
@@ -744,15 +715,11 @@ libgeos_inner: $(GEOS_DIR)/Makefile bin/uptodate .ALWAYS_REBUILD
 $(LIBPROJ): $(PROJ_DIR)/Makefile bin/uptodate .ALWAYS_REBUILD
 	@uptodate $@ $(PROJ_SRC_DIR) || $(MAKE) --no-print-directory -C $(PROJ_DIR) proj
 
-$(LIBEDIT): $(LIBEDIT_DIR)/Makefile bin/uptodate .ALWAYS_REBUILD
-	@uptodate $@ $(LIBEDIT_SRC_DIR) || $(MAKE) --no-print-directory -C $(LIBEDIT_DIR)/src
-
 $(LIBKRB5): $(KRB5_DIR)/Makefile bin/uptodate .ALWAYS_REBUILD
 	@uptodate $@ $(KRB5_SRC_DIR)/src || $(MAKE) --no-print-directory -C $(KRB5_DIR)
 
 # Convenient names for maintainers. Not used by other targets in the Makefile.
 .PHONY:  libjemalloc libgeos libproj libkrb5
-libedit:     $(LIBEDIT)
 libjemalloc: $(LIBJEMALLOC)
 libgeos:     $(LIBGEOS)
 libproj:     $(LIBPROJ)
@@ -969,7 +936,6 @@ $(COCKROACHSHORT): TAGS += short
 $(COCKROACHSHORT): $(C_LIBS_SHORT) | $(C_LIBS_DYNAMIC)
 
 $(COCKROACHSQL): BUILDTARGET = ./pkg/cmd/cockroach-sql
-$(COCKROACHSQL): $(if $(target-is-windows),,$(LIBEDIT))
 
 # For test targets, add a tag (used to enable extra assertions).
 $(test-targets): TAGS += crdb_test