Pipelines restructured for namespaced datasets

What's Changed

• feat(sc): restructure pipelines to support namespaced/multiple datasets by @p-d0 in https://github.com/dash0hq/dash0-operator/pull/1196
• ci(deps): let Dependabot update Python instrumentation requirements by @basti1302 in https://github.com/dash0hq/dash0-operator/pull/1198
• test: bump slackapi/slack-github-action from 3.0.3 to 3.0.5 by @dependabot[bot] in https://github.com/dash0hq/dash0-operator/pull/1201
• feat(sc): add metricrecorder components by @p-d0 in https://github.com/dash0hq/dash0-operator/pull/1200
• feat(sc): add spamfilter and s2m for k8s events by @p-d0 in https://github.com/dash0hq/dash0-operator/pull/1204
• chore(sc): harden check for requiring a default dash0 exporter by @p-d0 in https://github.com/dash0hq/dash0-operator/pull/1207
• fix(sc): use namespaced api client for sampling rules sync by @p-d0 in https://github.com/dash0hq/dash0-operator/pull/1208
• docs: add initial sc docs by @p-d0 in https://github.com/dash0hq/dash0-operator/pull/1133
• docs: add link to SC docs by @p-d0 in https://github.com/dash0hq/dash0-operator/pull/1209
• test: bump actions/setup-node from 6.4.0 to 7.0.0 by @dependabot[bot] in https://github.com/dash0hq/dash0-operator/pull/1210
• test: bump open-telemetry/opentelemetry-operator/target-allocator from v0.154.0 to v0.155.0 in /images/target-allocator in the production-dependencies group across 1 directory by @dependabot[bot] in https://github.com/dash0hq/dash0-operator/pull/1211

Full Changelog: https://github.com/dash0hq/dash0-operator/compare/0.147.0...0.148.0