SNOW-728803: Do not replace sqlText if it is specified by the user

[sfc-gh-ext-simba-lf]

Description

Regarding issue 137

The PR fixes a special case for submitting queries with requestId where:

1. User executes a request and the requestId is generated
2. The request fails due to a network error
3. Resubmitting the request with the requestId fails because the original request failed in step 2 and sqlText is replaced by the error message

With the PR, the sqlText will not be replaced if the user specifies a sqlText
So even if the original request fails, the connector will still execute the sqlText specified by the user

• Current

1. Call INSERT using sqlText that results in a network error
Network error. Could not reach Snowflake.

2. Call INSERT again using sqlText and requestId from step 1
[
  {
    ERRORMESSAGE: 'Error retrieving query results for request id: b15ce10a-88c8-
4cc1-a574-951698da3ce2, please use RESULT_SCAN instead'
  }
]

3. Call SELECT
[]

• With PR

1. Call INSERT using sqlText that results in a network error
Network error. Could not reach Snowflake.

2. Call INSERT again using sqlText and requestId from step 1
[ { 'number of rows inserted': 1 } ]

3. Call SELECT
[ { C1: 'hello' } ]

Checklist

• Format code according to the existing code style (run npm run lint:check -- CHANGED_FILES and fix problems in changed code)
• Create tests which fail without the change (if possible)
• Make all tests (unit and integration) pass (npm run test:unit and npm run test:integration)
• Extend the README / documentation and ensure is properly displayed (if necessary)
• Provide JIRA issue id (if possible) or GitHub issue id in commit message

[sfc-gh-ext-simba-lf]

Added test for special case when resubmitting a request:

1. Send an initial request that fails with an error
2. Send another request with the requestId and the sqlText from step 1 and passes if the sqlText is not replaced

If the sqlText is replaced, the response from mock_http_client.js is an error and the test will fail