Fixing ESlint issues and returning some missing rules

[jackyalbo]

Explain the changes

1. When we moved to a newer version of eslint, we moved to one that deprecated the rules for semicolons and spaces
   https://eslint.org/docs/latest/rules/
2. We need to move eventually to the replacement of these rules and to start using the stylistic plugin:
   https://eslint.style/

Issues: Fixed #xxx / Gap #xxx

Testing Instructions:

• Doc added/updated
• Tests added

[shirady]

@jackyalbo, more cases I found (during the last week with examples in case it helps):

• key-spacing
  noobaa-core/src/test/unit_tests/test_bucketspace_fs.js
  158:20 error Extra space after key '_id' key-spacing
• no-extra-semi
  noobaa-core/src/util/mongo_utils.js
  172:2 error Unnecessary semicolon no-extra-semi
• space-infix-ops
  noobaa-core/src/util/native_fs_utils.js
  461:65 error Operator '=' must be spaced space-infix-ops
• eol-last Newline required at end of file but not found eol-last
• comma-spacing

What about inserting the deprecated ones (one-by-one) -
and in case our code would not have many errors add the rule (probably we had the rule in the past).

[jackyalbo]

@jackyalbo, more cases I found (during the last week with examples in case it helps):

• key-spacing
  noobaa-core/src/test/unit_tests/test_bucketspace_fs.js
  158:20 error Extra space after key '_id' key-spacing
• no-extra-semi
  noobaa-core/src/util/mongo_utils.js
  172:2 error Unnecessary semicolon no-extra-semi
• space-infix-ops
  noobaa-core/src/util/native_fs_utils.js
  461:65 error Operator '=' must be spaced space-infix-ops
• eol-last Newline required at end of file but not found eol-last
• comma-spacing

What about inserting the deprecated ones (one-by-one) - and in case our code would not have many errors add the rule (probably we had the rule in the past).

I will merge this one. @shirady please follow my example and create another PR handling the rest of the missing errors. Thanks.