Save some size in pattern/{bitwise,comparison}_op.h

[swolchok]

bloaty told me that we were paying a noticeable size cost for the
::value members of these structs (at least after the PR in this stack
that reapplies #9841) and now we're not.

Test Plan: bash test/build_optimized_size_test.sh

before:
adopt functionref
==========
ExecuTorch with no ops binary size, unstripped:
-rwxr-xr-x  1 swolchok  staff  153928 Apr 25 11:08 cmake-out/test/size_test
ExecuTorch with portable ops binary size, unstripped:
-rwxr-xr-x  1 swolchok  staff  2150960 Apr 25 11:08 cmake-out/test/size_test_all_ops
ExecuTorch with optimized ops binary size, unstripped:
-rwxr-xr-x  1 swolchok  staff  5927336 Apr 25 11:08 cmake-out/test/size_test_all_optimized_ops
(.venv) swolchok@swolchok-mac ~/src/executorch> size cmake-out/test/size_test*
__TEXT	__DATA	__OBJC	others	dec	hex
81920	81920	0	4295049216	4295213056	10003c000	cmake-out/test/size_test
1474560	81920	0	4295655424	4297211904	100224000	cmake-out/test/size_test_all_ops
4505600	98304	0	4296376320	4300980224	1005bc000	cmake-out/test/size_test_all_optimized_ops

after:
ExecuTorch with no ops binary size, unstripped:
-rwxr-xr-x  1 swolchok  staff  153928 Apr 25 12:24 cmake-out/test/size_test
ExecuTorch with portable ops binary size, unstripped:
-rwxr-xr-x  1 swolchok  staff  2150960 Apr 25 12:24 cmake-out/test/size_test_all_ops
ExecuTorch with optimized ops binary size, unstripped:
-rwxr-xr-x  1 swolchok  staff  5887368 Apr 25 12:24 cmake-out/test/size_test_all_optimized_ops
(.venv) swolchok@swolchok-mac ~/src/executorch> size cmake-out/test/size_test*
__TEXT	__DATA	__OBJC	others	dec	hex
81920	81920	0	4295049216	4295213056	10003c000	cmake-out/test/size_test
1474560	81920	0	4295655424	4297211904	100224000	cmake-out/test/size_test_all_ops
4489216	98304	0	4296359936	4300947456	1005b4000	cmake-out/test/size_test_all_optimized_ops

(yes it's neutral; improves size results for further diffs)

[swolchok]

Stack from ghstack (oldest at bottom):

• Reapply #9841: Migrate elementwise_util callers to the variants with out_dtypes in template arguments #10491
• Reapply #9842: Save some size in dtype_util when dtype selective build is not in use #10490
• -> Save some size in pattern/{bitwise,comparison}_op.h #10489

[pytorch-bot]

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