[7.x] [kbn/optimizer] ignore compressed files when reporting stats (#71940)

[spalger]

Backports the following commits to 7.x:

• [kbn/optimizer] ignore compressed files when reporting stats ([kbn/optimizer] ignore compressed files when reporting stats #71940)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 9ca97db

Build metrics

async chunks size

id	value	diff	baseline
advancedSettings	67.7KB	-21.3KB	89.0KB
apm	3.7MB	-1.5MB	5.2MB
beats_management	422.5KB	-113.1KB	535.6KB
canvas	1.6MB	-513.2KB	2.1MB
charts	62.6KB	-11.3KB	73.9KB
console	1.1MB	-460.5KB	1.6MB
crossClusterReplication	473.7KB	-113.0KB	586.7KB
devTools	6.4KB	-3.2KB	9.6KB
discover	444.6KB	-166.5KB	611.1KB
enterpriseSearch	150.2KB	-57.2KB	207.4KB
graph	1.4MB	-620.9KB	2.0MB
grokdebugger	698.1KB	-303.3KB	1001.4KB
home	525.6KB	-187.9KB	713.5KB
indexLifecycleManagement	279.7KB	-79.7KB	359.4KB
indexManagement	1.1MB	-372.9KB	1.4MB
indexPatternManagement	703.3KB	-270.1KB	973.4KB
infra	3.6MB	-1.1MB	4.7MB
ingestManager	1.1MB	-390.8KB	1.5MB
ingestPipelines	579.6KB	-179.5KB	759.0KB
kibanaLegacy	153.1KB	-36.4KB	189.6KB
lens	24.7KB	-11.1KB	35.8KB
licenseManagement	170.8KB	-55.3KB	226.1KB
logstash	216.4KB	-81.1KB	297.5KB
management	176.8KB	-78.5KB	255.3KB
maps	3.9MB	-1.4MB	5.2MB
ml	14.7KB	-6.2KB	20.9KB
monitoring	1.2MB	-306.7KB	1.5MB
observability	313.1KB	-127.8KB	440.9KB
painlessLab	183.4KB	-79.6KB	263.0KB
regionMap	62.6KB	-11.3KB	73.9KB
remoteClusters	380.3KB	-133.7KB	514.0KB
rollup	338.5KB	-97.6KB	436.2KB
savedObjectsManagement	171.5KB	-61.4KB	232.9KB
searchprofiler	714.0KB	-311.1KB	1.0MB
security	1.1MB	-361.5KB	1.4MB
securitySolution	7.3MB	-2.0MB	9.3MB
snapshotRestore	763.5KB	-184.2KB	947.7KB
spaces	50.4KB	-13.5KB	63.9KB
tileMap	62.6KB	-11.3KB	73.9KB
transform	712.4KB	-235.1KB	947.4KB
triggers_actions_ui	703.2KB	-222.2KB	925.3KB
upgradeAssistant	334.9KB	-118.3KB	453.2KB
uptime	631.9KB	-206.3KB	838.2KB
visTypeMarkdown	58.5KB	-8.9KB	67.4KB
visTypeMetric	56.5KB	-7.9KB	64.4KB
visTypeTable	63.1KB	-11.3KB	74.4KB
visTypeTagcloud	56.5KB	-7.9KB	64.4KB
visTypeTimelion	56.5KB	-7.9KB	64.4KB
visTypeTimeseries	1.8MB	-646.2KB	2.4MB
visTypeVega	1.4MB	-670.0KB	2.1MB
visTypeVislib	56.5KB	-7.9KB	64.4KB
visualize	701.2KB	-232.6KB	933.8KB
watcher	609.6KB	-186.3KB	795.9KB
total	-	-14.1MB	-

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream