fix: sas9 public access denied handling

[medjedovicm]

Issue

Fixes #150

Intent

Covers the SAS9 Public Access Denied scenario. 2 places touched:

1. login() - User is not logged in. The login function is called with Public Account credentials. The adapter will return an object that contains an error message with error details and loggedIn is false. (image 1.)
2. request() - User with Public Account is already logged in within current browser. App loads, request function is called. The adapter will throw an error with details inside. (image 2.)

image 1.

image 2.

Checks

No PR (that involves a non-trivial code change) should be merged, unless all items below are confirmed! If an urgent fix is needed - use a tar file.

• All sasjs-cli unit tests are passing (npm test).
• (CI Runs this) All sasjs-tests are passing. If you want to run it manually (instructions available here).
• Data Controller builds and is functional on both SAS 9 and Viya

[github-actions]

Coverage report

Total coverage

Status	Category	Percentage	Covered / Total
🟡	Statements	62.72%	2027/3232
🔴	Branches	44.67%	738/1652
🔴	Functions	53.56%	301/562
🟡	Lines	73.99% (+2.25% 🔼)	3283/4437

Status of coverage: 🟢 - ok, 🟡 - slightly more than threshold, 🔴 - under the threshold

Show files with reduced coverage 🔻

Reduced coverage

Status	Filename	Statements	Branches	Functions	Lines
🟢	src/job-execution/WebJobExecutor.ts	16.07%	2.6%	10.53%	100% (+72.85% 🔼)

Status of coverage: 🟢 - ok, 🟡 - slightly more than threshold, 🔴 - under the threshold

Report generated by 🧪jest coverage report action from 3556eb3

[YuryShkoda]

@medjedovicm please a test cases for both scenarios