Support a few "shifted register" operations on Arm64

[tannergooding]

This makes progress towards #68028

[ghost]

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

Issue Details

---

This makes progress towards #68028

Author:	tannergooding
Assignees:	-
Labels:	area-CodeGen-coreclr
Milestone:	-

[tannergooding]

This has more substantial diffs:

coreclr_tests.run.Linux.arm64.checked.mch

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 490656348 (overridden on cmd)
Total bytes of diff: 490573808 (overridden on cmd)
Total bytes of delta: -82540 (-0.02 % of base)
    diff is an improvement.
    relative diff is an improvement.

libraries.crossgen2.Linux.arm64.checked.mch:

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 28398328 (overridden on cmd)
Total bytes of diff: 28392964 (overridden on cmd)
Total bytes of delta: -5364 (-0.02 % of base)
    diff is an improvement.
    relative diff is an improvement.

libraries.pmi.Linux.arm64.checked.mch:

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 62290396 (overridden on cmd)
Total bytes of diff: 62256676 (overridden on cmd)
Total bytes of delta: -33720 (-0.05 % of base)
    diff is an improvement.
    relative diff is an improvement.

libraries_tests.pmi.Linux.arm64.checked.mch:

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 147821448 (overridden on cmd)
Total bytes of diff: 147787264 (overridden on cmd)
Total bytes of delta: -34184 (-0.02 % of base)
    diff is an improvement.
    relative diff is an improvement.

Similar numbers exist for other platforms.

[tannergooding]

Example diffs are things like:

- lsl     w1, w1, #8
- orr     w0, w0, w1
+ orr     w0, w0, w1,  LSL #8

The couple regressions that do show up are additional alignment bytes inserted, so not really regressions.

[tannergooding]

Rebase onto main to pick up #76061

[tannergooding]

/azp run runtime-coreclr jitstress, runtime-coreclr gcstress0x3-gcstress0xc, Fuzzlyn

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[tannergooding]

/azp run runtime-coreclr jitstress, runtime-coreclr gcstress0x3-gcstress0xc, Fuzzlyn

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[tannergooding]

gcstress failures are unrelated arm32/x86 failures (all new code is under #ifdef TARGET_ARM64) and a case of a timeout that only repro'd 1/2 retries.

jitstress failures are related to the new disasm checks and are being resolved by #76202

[tannergooding]

This should be ready for review, CC. @dotnet/jit-contrib

[tannergooding]

Applied the formatting patch/squashed the applied fixes

[EgorBo]

LGTM, nice diffs! and thanks @SingleAccretion for code review 🙂