Migrate platform-sdk utils to serverless/utils tools

[pgrzesik]

This PR introduces the following changes:

• Introduce @serverless/utils as a dependency
• Bump @serverless/platform-client to latest version
• Remove use of login from platform-sdk and replace it with login functionality already implemented in plugin
• Replace getLoggedInUser, readConfigFile, writeConfigFile, refreshToken and logout from platform-sdk with utils equivalents

All of the above was tested with current testing suite + I've made a lot of "sanity" testing by hand locally.

Part of: #464

[codecov]

Codecov Report

Merging #536 (bfb54ec) into master (48ac891) will increase coverage by 0.19%.
The diff coverage is 87.17%.

@@            Coverage Diff             @@
##           master     #536      +/-   ##
==========================================
+ Coverage   48.84%   49.03%   +0.19%     
==========================================
  Files          90       90              
  Lines        2891     2896       +5     
==========================================
+ Hits         1412     1420       +8     
+ Misses       1479     1476       -3     

Impacted Files	Coverage Δ
lib/login.js	31.25% <50.00%> (+9.02%)	⬆️
lib/logout.js	33.33% <50.00%> (+8.33%)	⬆️
lib/interactiveCli/utils.js	37.50% <66.66%> (+8.92%)	⬆️
lib/interactiveCli/index.js	96.96% <100.00%> (ø)
lib/interactiveCli/register.js	69.81% <100.00%> (+0.58%)	⬆️
lib/interactiveCli/set-app.js	91.26% <100.00%> (+0.21%)	⬆️
lib/isAuthenticated.js	100.00% <100.00%> (ø)

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[pgrzesik]

Sorry, I thought I've sent requests for review 😬

[medikoo]

Thank you @pgrzesik. Looks excellent! 👍

Just few questions:

• Have integration tests were confirmed to pass?
• Have you tested the interactive CLI onboarding with this changes?
• How many more PR's do you think we need to fully ditch @serverless/platform-sdk from this package?

[pgrzesik]

Thank you @medikoo - unfortunately, I didn't run the integration tests locally as I don't have access to organization org for tests, would you be able to invite me so I can double check before merging?

Have you tested the interactive CLI onboarding with this changes?

I believe I tested all cases multiple times and confirmed that it's working as intended, I didn't notice any regression or anything after my changes.

How many more PR's do you think we need to fully ditch @serverless/platform-sdk from this package?

I would like to close it with two more - I'm currently working on a PR that introduces a wrapper for getting ServerlessSDK instance initialized with token or access key retrieved from config that could be used in all places and after that, I'd like to migrate all existing methods (but that needs merging all related PRs in platform repository. Additionally, I will be moving SDK.Deployment from platform-sdk to enterprise-plugin and I believe it deserves it's own PR as well.

[pgrzesik]

After talking with @medikoo on Slack I was able to successfully run integration tests locally both on master and this branch 💯

[eahefnawy]

Looks good @pgrzesik 👍