Improve test results to contain failed assertion

[sosnovsky]

          We need to extract this meaningful piece into the test result:

  ✘ [fail]: compose - saving and rendering a draft with RTL text (plain text) [ALL RETRIES FAILED for compose - saving and rendering a draft with RTL text (plain text)]
    ℹ (attempt 1 of 1) Failed:   AssertionError: expected '<div><br></div><div><br></div><div>--…' to include '<div dir="rtl">مرحبا<br></div>'
          at <anonymous> (/home/osboxes/flowcrypt-browser/test/source/tests/compose.ts:1508:62)
          at <anonymous> (/home/osboxes/flowcrypt-browser/test/source/test.ts:81:11)
          at BrowserPool.BrowserPool.withNewBrowserTimeoutAndRetry (/home/osboxes/flowcrypt-browser/test/source/browser/browser-pool.ts:113:11)
          at <anonymous> (/home/osboxes/flowcrypt-browser/test/source/test.ts:75:7)
          at <async> <anonymous> (/test/source/tests/compose.ts:1495:39)
          at <async> <anonymous> (../test/source/test.ts:75:55)

The line with (attempt x of x) Failed (last attempt)

Originally posted by @rrrooommmaaa in #5053 (comment)

[rrrooommmaaa]

duplicate of #5057

[sosnovsky]

duplicate of #5057

oops, missed it, closing this one