Add customdata to Jmeter tests (#179)

[amandahla]

Implementation of #179

• Requirement: The Dynamic volume provisioning must be set on the cluster

• If JMETER_WORKER_REMOTE_CUSTOM_DATA_ENABLED is set, before pod creation, a PVC will be created asking the cluster for a volume of size defined in the environment variable JMETER_WORKER_REMOTE_CUSTOM_DATA_VOLUME_SIZE and access mode ReadWriteMany.

• The volume will be the same for all pods and data from S3 bucket will be cloned using Rclone

Get variables from envvar file:

JMETER_WORKER_REMOTE_CUSTOM_DATA_ENABLED,true
JMETER_WORKER_REMOTE_CUSTOM_DATA_BUCKET,mybucket
JMETER_WORKER_REMOTE_CUSTOM_DATA_VOLUME_SIZE,1Gi
RCLONE_CONFIG_REMOTECUSTOMDATA_TYPE,s3
RCLONE_CONFIG_REMOTECUSTOMDATA_ACCESS_KEY_ID,value1
RCLONE_CONFIG_REMOTECUSTOMDATA_SECRET_ACCESS_KEY,value2
RCLONE_CONFIG_REMOTECUSTOMDATA_REGION,undefined
RCLONE_CONFIG_REMOTECUSTOMDATA_ENDPOINT,endpoint.com

[codecov-commenter]

Codecov Report

Merging #180 (c6986d4) into master (d269e22) will decrease coverage by 1.52%.
The diff coverage is 2.66%.

@@            Coverage Diff             @@
##           master     #180      +/-   ##
==========================================
- Coverage   59.74%   58.22%   -1.53%     
==========================================
  Files          36       36              
  Lines        2760     2834      +74     
==========================================
+ Hits         1649     1650       +1     
- Misses        991     1062      +71     
- Partials      120      122       +2     

Impacted Files	Coverage Δ
pkg/backends/jmeter/resources.go	68.75% <2.66%> (-16.97%)	⬇️

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[amandahla]

@lucasmdrs friendly ping 😊

[lucasmdrs]

Hey @amandahla thanks for the contribution! 💚

I'm leaving a couple of comments, please take a look when you have the time
Also, please make sure to document those environment variables 📝

[amandahla]

@lucasmdrs It seems like the same problem that happened in #206 , right?

[lucasmdrs]

hey @amandahla , that's a different one. there are some trailing spaces in the doc:

------
/github/workspace/docs/jmeter/writing-tests.md:395:371 MD009/no-trailing-spaces Trailing spaces [Expected: 0 or 2; Actual: 1]

[lucasmdrs]

Thank you for the awesome contribution @amandahla !
💚 💙 💜 💛 ❤️