Merge pull request #105 from shopware/add-otel #418

Job	Run time
generate-matrix	8s
PHP FPM 8.1	2m 43s
PHP FPM 8.2	2m 46s
PHP FPM 8.3	2m 42s
Build Caddy with 8.1	35s
PHP FPM 8.1 with OpenTelemetry	1m 21s
Build Caddy with 8.2	56s
PHP FPM 8.2 with OpenTelemetry	1m 24s
Build Caddy with 8.3	57s
PHP FPM 8.3 with OpenTelemetry	1m 26s
Test Image	0s
Build Caddy 8.1 with OpenTelemetry	14s
Build Caddy 8.2 with OpenTelemetry	13s
Build Caddy 8.3 with OpenTelemetry	14s
	15m 39s

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