Add copyright/license headers to all scripts

[yurishkuro]

In our make lint and make fmt targets we ensure that all Go source files have a copyright & license comments like this:

$ head -2 cmd/jaeger/main.go
// Copyright (c) 2023 The Jaeger Authors.
// SPDX-License-Identifier: Apache-2.0

Objective:

• modify ./scripts/updateLicense.py to also work for shell scripts under ./scripts/
• make sure not to override the shebang line
• also make sure this script works for the Makefiles, which have the pattern of Makefiles* or *.mk
• invoke the script as needed from lint and fmt targets

Verification:

• running make lint should flag all the scripts and Makefiles that are missing the license headers
• running make lint should update them as needed

DO NOT commit the changes to the file headers, only raise a PR containing changes to the script & make targets.

[Zen-cronic]

i believe the ALL_SRC variable in Makefile needs to be updated too? So that the .sh files are auto reformatted.
Something like:

ALL_SRC = $(shell find . \( -name '*.go' -o -name '*.sh' \) 
                   -not -name '_*' \
                   -not -name '.*' \
                    ... // the rest

Also, are the .py scripts included?

[yurishkuro]

Yes py scripts are included