[pkg/stanza/fileconsumer] Optimize file finding logic

[djaglowski]

This PR migrates us from doublestar.FilepathGlob to doublestar.GlobWalk. There are a few benefits to this:

1. Pattern validation, cleaning, and parsing is pulled forward so that it only needs to be performed once at startup. This accounts for the bulk of the performance improvement.
2. We can make use of a "walk function" where we can handle each element earlier in the process. Currently, this is only used to cache and immediately recall previous decisions about file paths, but in the future it may be useful for filtering. e.g. The "max age" filter could be applied here, rather than after the list of files are returned.

Benchmarks show roughly a 5% decrease in CPU cycles and a 20% decrease in memory consumption.

goos: darwin
goarch: arm64
pkg: github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer/matcher/internal/finder
cpu: Apple M1 Max
                       │ pkg/stanza/main-finder.txt │   pkg/stanza/finder-optimize.txt   │
                       │           sec/op           │   sec/op     vs base               │
Find10kFiles-10                         12.40m ± 1%   11.47m ± 4%  -7.44% (p=0.000 n=10)
Find10kFilesComplex-10                  2.887m ± 2%   2.784m ± 2%  -3.57% (p=0.000 n=10)
geomean                                 5.982m        5.652m       -5.53%

                       │ pkg/stanza/main-finder.txt │    pkg/stanza/finder-optimize.txt    │
                       │            B/op            │     B/op      vs base                │
Find10kFiles-10                        5.581Mi ± 0%   4.395Mi ± 0%  -21.25% (p=0.000 n=10)
Find10kFilesComplex-10                 661.0Ki ± 0%   526.0Ki ± 0%  -20.43% (p=0.000 n=10)
geomean                                1.898Mi        1.502Mi       -20.84%

                       │ pkg/stanza/main-finder.txt │   pkg/stanza/finder-optimize.txt    │
                       │         allocs/op          │  allocs/op   vs base                │
Find10kFiles-10                         80.25k ± 0%   70.21k ± 0%  -12.51% (p=0.000 n=10)
Find10kFilesComplex-10                  9.437k ± 0%   8.341k ± 0%  -11.61% (p=0.000 n=10)
geomean                                 27.52k        24.20k       -12.06%

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