Hugo front-matter fixes for aliases and linkTitle (#3592)

- Followup changes for
open-telemetry/opentelemetry.io#2793
- There are only changes to Hugo front matter
- Adds `likeTitle`s for "Compatibility" pages
- Adds aliases for pages that have moved or were renamed
- Related:
open-telemetry/opentelemetry.io#3013 -- the
`compatibility/openmetrics` spec page is in the list because it was
renamed

/cc @svrnm @cartermp

specification/common/README.md

@@ -1,6 +1,7 @@
 <!--- Hugo front matter used to generate the website version of this page:
 aliases: [/docs/reference/specification/common/common]
 --->
+
 # Common specification concepts
 
 **Status**: [Stable, Feature-freeze](../document-status.md)