feat: use go-freelru consistently

[kruskall]

Motivation/summary

replace all lru cache deps with go-freelru

go-freelru requires a capacity so use a reasonable default

Checklist

• Update CHANGELOG.asciidoc
• Documentation has been updated

For functional changes, consider:

• Is it observable through the addition of either logging or metrics?
• Is its use being published in telemetry to enable product improvement?
• Have system tests been added to avoid regression?

How to test these changes

Related issues

Closes #16435

[mergify]

This pull request does not have a backport label. Could you fix it @kruskall? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-7.17 is the label to automatically backport to the 7.17 branch.
• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.
• backport-9./d is the label to automatically backport to the 9./d branch. /d is the digit.
• backport-8.x is the label to automatically backport to the 8.x branch.
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[mergify]

This pull request is now in conflicts. Could you fix it @kruskall? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b feat/standard-cache upstream/feat/standard-cache
git merge upstream/main
git push upstream feat/standard-cache

[kruskall]

@Mergifyio backport 8.19

[mergify]

backport 8.19

✅ Backports have been created

• #17208 [8.19] (backport #16549) feat: use go-freelru consistently has been created for branch 8.19 but encountered conflicts

[simitt]

@kruskall what are the performance and change in resource usage implications from this PR?

[kruskall]

performance didn't change much, this is mostly to drop deprecated/unmaintained libraries

[1pkg]

Tested for presence of the cache packages in the binary.

For any version before 9.1, e.g. v9.0.1.

go version -m build/apm-server-darwin-arm64 | grep -e cache -e golang-lru
        dep     github.com/hashicorp/golang-lru v1.0.2  h1:dV3g9Z/unq5DpblPpw+Oqcv4dU/1omnb4Ok8iPY6p1c=
        dep     github.com/patrickmn/go-cache   v2.1.0+incompatible     h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=

For 9.1

go version -m build/apm-server-darwin-arm64 | grep -e cache -e golang-lru


go version -m build/apm-server-darwin-arm64 | grep go-freelru                                         
        dep     github.com/elastic/go-freelru   v0.16.0 h1:gG2HJ1WXN2tNl5/p40JS/l59HjvjRhjyAa+oFTRArYs=