fix: Unable to sync columns when dataset name has '+'

[diegomedina248]

SUMMARY

When editing a dataset, attempting to sync columns from source might fail if the dataset name has special character.
The table name is sent as a query param to the API and it's not properly encoded.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Before:

Screen.Recording.2022-08-08.at.20.09.58.mov

After:

new.mov

TESTING INSTRUCTIONS

1. Create a dataset with name “Vehicle Sales +”
2. Edit the dataset
3. Navigate to columns
4. Click on SYNC COLUMNS FROM SOURCE
5. Will get error message: Dataset does not exist

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #21019 (6fcadc6) into master (846529a) will increase coverage by 0.00%.
The diff coverage is 94.11%.

❗ Current head 6fcadc6 differs from pull request most recent head 20ed9e2. Consider uploading reports for the commit 20ed9e2 to get more accurate results

@@           Coverage Diff           @@
##           master   #21019   +/-   ##
=======================================
  Coverage   66.35%   66.35%           
=======================================
  Files        1767     1767           
  Lines       67335    67349   +14     
  Branches     7144     7145    +1     
=======================================
+ Hits        44678    44691   +13     
  Misses      20829    20829           
- Partials     1828     1829    +1     

Flag	Coverage Δ
javascript	52.11% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...end/src/components/Datasource/DatasourceEditor.jsx	65.61% <0.00%> (-0.27%)	⬇️
superset/connectors/sqla/models.py	90.32% <100.00%> (-0.01%)	⬇️
superset/db_engine_specs/base.py	88.43% <100.00%> (+0.23%)	⬆️
superset/models/core.py	88.75% <100.00%> (+0.05%)	⬆️

📣 Codecov can now indicate which changes are the most critical in Pull Requests. Learn more

[suddjian]

;)

[rusackas]

Re-running E2E tests, hoping to merge if they make it! 🤞