Improve StreamFlow on Kubernetes

[GlassOfWhiskey]

This commit heavily refactors the StreamFlow Helm chart to simplify its deployment on top of Kubernetes clusters.

In addition, this commit adds a networkPolicy flag to control the behaviour of CWL DockerRequirement objects into Kubernetes Pod items. Normally, the CWL NetworkAccess requirement is enforced through Kubernetes NetworkPolicy objects. However, NetworkPolicy objects regulate the network security inside a cluster, and giving the StreamFlow Pod permissions to create/delete them may result in unwanted security flaws. The networkPolicy option can be set to False to ignore the CWL NetworkAccess enforcement in such cases.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
446	1	445	4

View the top 1 failed test(s) by shortest run time

cwl-v1.1-6397014050177074c9ccd0d771577f7fa9f728a3/conformance_tests.cwltest.yaml::conformance_tests::cwltest::yaml::inplace_update_on_dir_content

Stack Traces | 0.363s run time

CWL test execution failed. 
Returned non-zero but it should be zero
Test: job: 
  file:.../streamflow/streamflow/cwl-v1.1-6397014050177074c9ccd0d771577f7fa9f728a3/tests/empty.json
tool: 
  file:.../streamflow/streamflow/cwl-v1.1-6397014050177074c9ccd0d771577f7fa9f728a3/tests/inpdir_update_wf.cwl
doc: inplace update has side effect on directory content
label: inplace_update_on_dir_content
tags:
- inplace_update
- workflow
output:
  a:
  - basename: blurb
    class: File
    location: blurb
  b:
  - basename: blurb
    class: File
    location: blurb
id: 236
line: '3042'

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[LanderOtto]

LGTM