Fix missing lib/ directory in Ubuntu Noble SDK, remove unused toolchain components

[xtremekforever]

Apparently I didn't test very well from PR #188, because when I went to use the Ubuntu Noble Swift SDK, I got this error:

error: link command failed with exit code 1 (use -v to see invocation)
ld.lld: error: ~/.swiftpm/swift-sdks/6.0.3-RELEASE_ubuntu_noble_aarch64.artifactbundle/6.0.3-RELEASE_ubuntu_noble_aarch64/aarch64-unknown-linux-gnu/ubuntu-noble.sdk/usr/lib/aarch64-linux-gnu/libm.so:4: cannot find /lib/aarch64-linux-gnu/libm.so.6 inside ~/.swiftpm/swift-sdks/6.0.3-RELEASE_ubuntu_noble_aarch64/aarch64-unknown-linux-gnu/ubuntu-noble.sdk
>>> GROUP ( /lib/aarch64-linux-gnu/libm.so.6  AS_NEEDED ( /lib/aarch64-linux-gnu/libmvec.so.1 ) )
>>>         ^
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ld.lld: error: ~/.swiftpm/swift-sdks/6.0.3-RELEASE_ubuntu_noble_aarch64.artifactbundle/6.0.3-RELEASE_ubuntu_noble_aarch64/aarch64-unknown-linux-gnu/ubuntu-noble.sdk/usr/lib/aarch64-linux-gnu/libm.so:4: cannot find /lib/aarch64-linux-gnu/libm.so.6 inside /~/.swiftpm/swift-sdks/6.0.3-RELEASE_ubuntu_noble_aarch64.artifactbundle/6.0.3-RELEASE_ubuntu_noble_aarch64/aarch64-unknown-linux-gnu/ubuntu-noble.sdk
>>> GROUP ( /lib/aarch64-linux-gnu/libm.so.6  AS_NEEDED ( /lib/aarch64-linux-gnu/libmvec.so.1 ) )
>>>         ^

Turns out, the packages for Ubuntu Noble do not come with a lib/ symlink included, so all I needed was to add a custom step to create that symlink from ubuntu-noble.sdk/lib -> ubuntu-noble.sdk/usr/lib and all is well.

As a part of these changes, I also added a missing cleanup of the target toolchain to remove unused parts of the LinuxRecipe as is done for the WebAssemblyRecipe. Doing this reduces the size of ubuntu-noble.sdk from 1GB to 721MB, when building the Swift SDK without docker. This can help for the end-to-end tests, and is nice to have for smaller Swift SDK distributions.

Finally, I updated the EndToEndTests to provide linuxDistributionVersion and set the Swift60_Ubuntu tests to use "24.04" as a way to test this lib/ directory fix. This has me thinking we may want to think about end-to-end tests for each version of Ubuntu, like "20.04", "22.04", and "24.04", for each version of Swift. What do you think @euanh ?

[MaxDesiatov]

@swift-ci test

[euanh]

[901/1037] Emitting module NIOCore
/code/.build/checkouts/swift-nio/Sources/NIOCore/AsyncSequences/NIOAsyncWriter.swift:545:24: error: cannot infer contextual base in reference to member 'lock'
 543 |                 // We are manually locking here to hold the lock across the withCheckedContinuation call
 544 |                 let unsafe = self._state.unsafe
 545 |                 unsafe.lock()
     |                        `- error: cannot infer contextual base in reference to member 'lock'
 546 | 
 547 |                 let action = unsafe.withValueAssumingLockIsAcquired {
 ...

[MaxDesiatov]

main snapshot job doesn't block us so we can merge it if needed. This is a (hopefully temporary) regression reported in apple/swift-nio#3124

[MaxDesiatov]

Supposedly fixed in swiftlang/swift#79710, which I expect would be included in a forthcoming main snapshot.

[MaxDesiatov]

@swift-ci test