Add support for GRPC storage plugin

[pavolloffay]

Resolves #1042
Supersedes #1045

How does it work:

User has to specify grpc-plugin as storage.type and image with the plugin binary in storage.grpcPlugin.image. The image has to copy plugin binary into /plugin/ directory. At the moment this is not configurable. If there will be requests we could make that configurable in the CR.

The image is used for init container. At jaeger startup the init container copies the plugin binary into volume. This makes the binary visible to Jaeger.

The flags for the storage plugin (bibary, configuration-file, log-level) are provided in storage.options, to be consistent with other storage implementations. The configuration file for the storage plugin has to be explicitly configured in storage volumes as a config map (the user is responsible for creating it).

apiVersion: jaegertracing.io/v1
kind: Jaeger
metadata:
  name: clickhouse-grpc-plugin
spec:
  storage:
    type: grpc-plugin
    grpcPlugin:
      image: ghcr.io/pavolloffay/jaeger-clickhouse:0.4.1
    options:
      grpc-storage-plugin:
        binary: /plugin/jaeger-clickhouse
        configuration-file: /plugin-config/config.yaml
        log-level: debug
  volumeMounts:
    - name: plugin-config
      mountPath: /plugin-config
  volumes:
    - name: plugin-config
      configMap:
        name: jaeger-clickhouse

This PR does not contain e2e tests. The e2e tests will be added in a separate PR.

[codecov]

Codecov Report

Merging #1517 (9020585) into master (25e9291) will decrease coverage by 0.00%.
The diff coverage is 87.87%.

❗ Current head 9020585 differs from pull request most recent head 5c5e848. Consider uploading reports for the commit 5c5e848 to get more accurate results

@@            Coverage Diff             @@
##           master    #1517      +/-   ##
==========================================
- Coverage   87.93%   87.93%   -0.01%     
==========================================
  Files          92       93       +1     
  Lines        5778     5811      +33     
==========================================
+ Hits         5081     5110      +29     
- Misses        532      534       +2     
- Partials      165      167       +2     

Impacted Files	Coverage Δ
pkg/metrics/bootstrap.go	0.00% <ø> (ø)
pkg/apis/jaegertracing/v1/jaeger_types.go	87.50% <33.33%> (-12.50%)	⬇️
pkg/storage/grpc_plugin.go	90.90% <90.90%> (ø)
pkg/deployment/all_in_one.go	100.00% <100.00%> (ø)
pkg/deployment/collector.go	100.00% <100.00%> (ø)
pkg/deployment/ingester.go	100.00% <100.00%> (ø)
pkg/deployment/query.go	100.00% <100.00%> (ø)

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[rubenvp8510]

I think we should add documentation on how this works. (something similar to the description of this PR)

[rubenvp8510]

I think the import order here is not correct, please verify

[pavolloffay]

it passes CI check. We should perhaps use different tooling to catch this on CI

[pavolloffay]

re docs- yes definitely I will add them to docs repo.