Remove redundant regex operators used in tests

This is another follow up CL to my previous CL [1], which ported
multiple tests from FrameworksCoreTests to RunSettingsLibRoboTests.

While porting the previous test, redundant alternation operators "|"
were mistakenly introduced.  With this CL, those redundant operators
will be removed.

This CL also removes parentheses that are unnecessary for our tests.

 [1]: Iad926ffd9806482a5aef0d8c20d2049be40d03c9
      08a3ecea

Bug: 72940586
Test: make RunSettingsLibRoboTests -j
Change-Id: Idc7a63c7c9064fdfadf5f26f8c68a52d48890e13