Prepare release v0.108.0

[github-actions]

Description

• Release Helm chart version 0.108.0
• Includes collector version 0.108.1

[jvoravong]

Test Failures:

pre-commit / pre-commit is failing due to an extra new line being added to changelog entries that use the "|" option in sub-context. This is fixable.

We also have this test failure across the board.

=== RUN   Test_Histograms/histogram_metrics_captured
    histogram_test.go:266: 
        	Error Trace:	/home/runner/work/splunk-otel-collector-chart/splunk-otel-collector-chart/functional_tests/histogram_test.go:266
        	Error:      	Received unexpected error:
        	            	the following errors occurred:
        	            	 -  resource "map[host.name:kind-control-plane http.scheme:http k8s.cluster.name:sock k8s.namespace.name:kube-system k8s.node.name:kind-control-plane os.type:linux server.port:9153 service.name:coredns url.scheme:http]": missing expected scope: otelcol/prometheusreceiver
        	            	 -  resource "map[host.name:kind-control-plane http.scheme:http k8s.cluster.name:sock k8s.namespace.name:kube-system k8s.node.name:kind-control-plane os.type:linux server.port:9153 service.name:coredns url.scheme:http]": unexpected scope: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/prometheusreceiver
        	Test:       	Test_Histograms/histogram_metrics_captured
    histogram_test.go:370: 
        	Error Trace:	/home/runner/work/splunk-otel-collector-chart/splunk-otel-collector-chart/functional_tests/histogram_test.go:370
        	Error:      	Received unexpected error:
        	            	the following errors occurred:
        	            	 -  resource "map[host.name:kind-control-plane http.scheme:https k8s.cluster.name:sock k8s.namespace.name:kube-system k8s.node.name:kind-control-plane os.type:linux url.scheme:https]": missing expected scope: otelcol/prometheusreceiver
        	            	 -  resource "map[host.name:kind-control-plane http.scheme:https k8s.cluster.name:sock k8s.namespace.name:kube-system k8s.node.name:kind-control-plane os.type:linux url.scheme:https]": unexpected scope: github.com/open-telemetry/opentelemetry-collector-contrib/receiver/prometheusreceiver
        	Test:       	Test_Histograms/histogram_metrics_captured
--- FAIL: Test_Histograms (54.85s)
    --- FAIL: Test_Histograms/histogram_metrics_captured (54.51s)

[crobert-1]

We also have this test failure across the board.

This was a purposeful breaking change upstream to make scope names of components consistent. The test data should be updated to match the new expected value 👍 (For reference, view the Breaking changes in the v0.107.0 release notes)