Github actions cutover and linting

[chayim]

closes #80

[chayim]

Sample build: now pushing to s3 snapshots for branchs: https://github.com/RedisGears/rgsync/actions/runs/2225442318
Latest changes re-enable everything.
Note: This PR must be merged after #111 and #58

[lgtm-com]

This pull request introduces 4 alerts and fixes 4 when merging 21dd461 into 7861d51 - view on LGTM.com

new alerts:

• 3 for 'import *' may pollute namespace
• 1 for Variable defined multiple times

fixed alerts:

• 3 for 'import *' may pollute namespace
• 1 for Unused import

[lgtm-com]

This pull request introduces 4 alerts and fixes 4 when merging ea6d5e2 into 7861d51 - view on LGTM.com

new alerts:

• 3 for 'import *' may pollute namespace
• 1 for Variable defined multiple times

fixed alerts:

• 3 for 'import *' may pollute namespace
• 1 for Unused import

[lgtm-com]

This pull request introduces 4 alerts and fixes 4 when merging 9688c62 into 7861d51 - view on LGTM.com

new alerts:

• 3 for 'import *' may pollute namespace
• 1 for Variable defined multiple times

fixed alerts:

• 3 for 'import *' may pollute namespace
• 1 for Unused import