[clang] [llvm] [NFCI][Sanitizer] Convert Matcher::Globs from StringMap to vector. (PR #140964)

[Qinkun Bao via cfe-commits]

qinkunbao wrote:

This PR change converts Matcher::Globs from StringMap to vector. However, after the change, some unit tests are broken. 
For example,
```
// build/unittests/Support/./SupportTests --gtest_filter=SpecialCaseListTest.Basic
TEST_F(SpecialCaseListTest, Basic) {
  std::unique_ptr<SpecialCaseList> SCL =
      makeSpecialCaseList("# This is a comment.\n"
                          "\n"
                          "src:hello\n"
                          "src:bye\n"
                          "src:hi=category\n"
                          "src:z*=category\n");
  EXPECT_TRUE(SCL->inSection("", "src", "hello"));
}
```

Investigation revealed that `bool GlobPattern::match(StringRef S)` fails to match the input "hello". Logs indicate a change in the `Prefix` within `GlobPattern` from "hello" to "hilo" at some points. 

https://github.com/llvm/llvm-project/pull/140964