[llvm] ADT: Add constructor from uint64_t array for Bitset (PR #162703)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-armv7-global-isel` running on `linaro-clang-armv7-global-isel` while building `llvm` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/39/builds/8202

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'LLVM-Unit :: ADT/./ADTTests/14/16' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/tcwg-buildbot/worker/clang-armv7-global-isel/stage1/unittests/ADT/./ADTTests-LLVM-Unit-647955-14-16.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=16 GTEST_SHARD_INDEX=14 /home/tcwg-buildbot/worker/clang-armv7-global-isel/stage1/unittests/ADT/./ADTTests
--

Note: This is test shard 15 of 16.
[==========] Running 120 tests from 81 test suites.
[----------] Global test environment set-up.
[----------] 1 test from FixedPoint
[ RUN      ] FixedPoint.toString
[       OK ] FixedPoint.toString (0 ms)
[----------] 1 test from FixedPoint (0 ms total)

[----------] 10 tests from APFloatTest
[ RUN      ] APFloatTest.Denormal
[       OK ] APFloatTest.Denormal (0 ms)
[ RUN      ] APFloatTest.SemanticsDeath
[       OK ] APFloatTest.SemanticsDeath (1908 ms)
[ RUN      ] APFloatTest.Float8UZConvert
[       OK ] APFloatTest.Float8UZConvert (0 ms)
[ RUN      ] APFloatTest.ilogb
[       OK ] APFloatTest.ilogb (0 ms)
[ RUN      ] APFloatTest.PPCDoubleDoubleHashValue
[       OK ] APFloatTest.PPCDoubleDoubleHashValue (0 ms)
[ RUN      ] APFloatTest.ConvertE5M2ToE4M3FN
[       OK ] APFloatTest.ConvertE5M2ToE4M3FN (0 ms)
[ RUN      ] APFloatTest.Float8E4M3FNUZChangeSign
[       OK ] APFloatTest.Float8E4M3FNUZChangeSign (0 ms)
[ RUN      ] APFloatTest.Float8E5M2FNUZToDouble
[       OK ] APFloatTest.Float8E5M2FNUZToDouble (0 ms)
[ RUN      ] APFloatTest.Float8E8M0FNUGetSignedValues
[       OK ] APFloatTest.Float8E8M0FNUGetSignedValues (8510 ms)
[ RUN      ] APFloatTest.Float6E2M3FNNext
[       OK ] APFloatTest.Float6E2M3FNNext (0 ms)
[----------] 10 tests from APFloatTest (10424 ms total)

[----------] 7 tests from APIntTest
[ RUN      ] APIntTest.PowZeroTo5
[       OK ] APIntTest.PowZeroTo5 (0 ms)
[ RUN      ] APIntTest.i256
[       OK ] APIntTest.i256 (0 ms)
[ RUN      ] APIntTest.divrem_big6
[       OK ] APIntTest.divrem_big6 (0 ms)
[ RUN      ] APIntTest.Splat
[       OK ] APIntTest.Splat (0 ms)
[ RUN      ] APIntTest.extractBits
[       OK ] APIntTest.extractBits (0 ms)
[ RUN      ] APIntTest.abds
[       OK ] APIntTest.abds (0 ms)
...

```

</details>

https://github.com/llvm/llvm-project/pull/162703