Remove trailing slash in "Official https://julialang.org/ release"

[LilithHafner]

Pairs with JuliaLang/julia#53978

[LilithHafner]

We should only make this change in Julia 1.12+ because previous versions expect Base.TAGGED_RELEASE_BANNER == "Official https://julialang.org/ release"

[DilumAluthge]

We should only make this change in Julia 1.12+

Probably the simplest way is to just have an if in this Bash script, and do something like sed or grep the VERSION file.

@gbaraldi What do you think?

The more complicated way would be to make some release- branches on this repo (the julia-buildkite repo). That's a more complex approach that brings more overhead.

[LilithHafner]

Lovely, bash is my favorite programming language!

[LilithHafner]

grep -P is not supported. Refactoring.

[LilithHafner]

Make Options:
 -> -j4
 -> VERBOSE=1
 -> TAGGED_RELEASE_BANNER=Official https://julialang.org release

Seems to be working. Do we test building old versions of Julia in CI here?

[DilumAluthge]

Do we test building old versions of Julia in CI here?

Currently, in this repo, PRs against the main branch of this repo will only test building the master branch of Julia.

It is possible to do a test against a different branch of Julia. I don't remember the steps off the top of my head, but @gbaraldi might remember.