JIT: Template EH-specific checks in 3-opt layout

[amanasifkhalid]

3-opt performs various checks within hot loops to maintain EH invariants. Since we know beforehand if the method has EH regions or not, we can save a bit of throughput in the latter case by skipping these checks.

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[amanasifkhalid]

cc @dotnet/jit-contrib, @AndyAyersMS PTAL. No diffs. TP improvement is quite small (and almost nonexistent when compiling with MSVC), though this might help keep the cost of rerunning 3-opt down if we decide to implement some strategy for improving upon the single pass. Thanks!

[amanasifkhalid]

I'm reviving this since #112004 added some more hot EH checks in. That change also takes care to keep call-finally pairs together when reordering the block list, so we can relax the check in ThreeOptLayout::ConsiderEdge for aligning edges out of call-finally pairs.

[amanasifkhalid]

Small diffs from being able to consider edges out of BBJ_CALLFINALLYRET blocks; this looks like a PerfScore improvement. @AndyAyersMS could you PTAL? Thanks!