[fix] Fix variable interpolation in the workflows

[i5okie]

The inline variable setting commands do not correctly interpret the environment variables. This results in variables not being updated:

$ export IMAGE_TAG=sha-c78888
$ yq e -vi '.traction.ui.image.tag = $IMAGE_TAG' services/traction/charts/dev/values.yaml
...
10:40:15 GetMatchingNodes [DEBU] >>
10:40:15 getVariableOperator [DEBU] getVariableOperator IMAGE_TAG
10:40:15 PrintResults [DEBU] PrintResults for 1 matches
10:40:15 PrintResults [DEBU] -- print sep logic: p.firstTimePrinting: false, previousDocIndex: 0, mappedDoc.Document: 0
10:40:15 PrintResults [DEBU] D0, P[], (doc)::traction:
...

Using env variable operator env() fixes this issue:

$ export IMAGE_TAG=sha-c78888
$ yq e -vi '.traction.ui.image.tag = env(IMAGE_TAG)' services/traction/charts/dev/values.yaml
...
10:41:45 GetMatchingNodes [DEBU] >>
10:41:45 envOperator [DEBU] EnvOperator, env name:%!(EXTRA string=IMAGE_TAG)
10:41:45 envOperator [DEBU] ENV tag%!(EXTRA string=!!str)
10:41:45 envOperator [DEBU] ENV value%!(EXTRA string=sha-c78888)
10:41:45 envOperator [DEBU] ENV Kind%!(EXTRA yaml.Kind=8)
10:41:45 UpdateAttributesFrom [DEBU] UpdateAttributesFrom: n: 0 - [traction ui image tag] other: 0 - []
10:41:45 PrintResults [DEBU] PrintResults for 1 matches
...