Upload dataset using Buffer

[std4lqi]

What It Does
Upload dataset using Buffer, instead of string. Fix zowe/zowe-explorer-vscode#2533

How to Test
On Windows, upload a text data with // at the first line, as follows. It's expected to be saved in dataset successfully.

// abc

Review Checklist
I certify that I have:

• tested my changes
• added/updated automated tests
• updated the changelog
• followed the contribution guidelines

Additional Comments

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9497b0f) 73.04% compared to head (5435aea) 73.04%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #152   +/-   ##
=======================================
  Coverage   73.04%   73.04%           
=======================================
  Files          80       80           
  Lines         983      983           
  Branches      127      128    +1     
=======================================
  Hits          718      718           
+ Misses        265      244   -21     
- Partials        0       21   +21     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[zFernand0]

Very obscure issue indeed 🤯

Thanks for fixing! 😋

Here is a VSIX (with this branch bundled in) in case you want to test it out.
https://ent.box.com/s/2u10v45jyq1nia2fstj7zczmhuj2au0c

Please keep in mind that you may need to delete any cached data related to FTP in %userprofile%/.vscode/extensions/ and %appdata%/Code/CachedXYZ (kudos to @traeok for that)

[github-actions]

Release succeeded for the master branch. 🎉

The following packages have been published:

• npm: @zowe/zos-ftp-for-zowe-cli@2.1.8

_{Powered by Octorelease 🚀}