[compiletest] Differentiate between LLVM LLDB and Apple LLDB

[Walnut356]

This patch causes compiletest to treat LLVM and Apple LLDB versions uniquely, including modified min-version directives. We'll need this level of granularity going forward:

• Add lldb-repr command for tests/debuginfo #158298 requires LLVM LLDB 22.1.x. Currently, compiletest only cares about major versions.
• @jieyouxu's efforts to pin debugger versions

Any tests that specified min-lldb-version have been updated to equivalent min-apple-lldb-version and min-llvm-lldb-version directives to preserve existing test filters.

r? @Kobzol, @jieyouxu

[rustbot]

compiletest directives have been modified. Please add or update docs for the
new or modified directive in src/doc/rustc-dev-guide/.

Some changes occurred in src/tools/compiletest

cc @jieyouxu

[rustbot]

Kobzol is not on the review rotation at the moment.
They may take a while to respond.

[jieyouxu]

Looks very reasoanble, one question

View changes since this review

[Kobzol]

Later we can add some small command to auto-bump those versions across all debugger files, lol. Though Find + replace will also do, I guess.

Thanks, this looks like it should unblock checking for LLDB on CI.

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.