refactor: manipulate entire context instead of TestSetXXX

[hthieu1110]

Linked to #1475

• add testSetContext
• std.TestSetOrigCaller => t.SetPreviousRealm + remove X_testSetOrigCaller
• std.TestSetOrigSend => t.SetOriginSend, testing.SetOriginSend + remove X_testSetOrigSend
• std.TestSetOrigPkgAddr => t/testing.SetOrignalPkgAddress + remove X_testSetOrigPkgAddr
• std.TestSkipHeights => t/testing.SkipHeights + remove TestSkipHeigts
• std.TestSetRealm => t/testing.SetRealm + remove X_testSetRealm
• std.TestIssueCoin => t/testing.IssueCoins

Should we do these refactors in the scope of this PR ?

• implement test banker on Gno side
• implement test log on Gno side
  UPDATE: banker, log are not in the scope of this PR

[Gno2D2]

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Codecov Report

Attention: Patch coverage is 76.66667% with 14 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
gnovm/tests/stdlibs/testing/context_testing.go	76.27%	12 Missing and 2 partials ⚠️

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[leohhhn]

If possible, lets rename and modify t/testing.SkipHeights to SetHeight(), and have it only modify the block number, while having a separate function modify the block timestamp, such as t.SetTimestamp(). This value would be read by time.Now()

Once we get the API down, let me know, and I'll help on modifying the docs for this.

[hthieu1110]

If possible, lets rename and modify t/testing.SkipHeights to SetHeight(), and have it only modify the block number, while having a separate function modify the block timestamp, such as t.SetTimestamp(). This value would be read by time.Now()

Once we get the API down, let me know, and I'll help on modifying the docs for this.

IMHO, SkipHeigh make more sense with current usage and simpler to use because we do not need to get the current height to calculate the "newHeight" to set with SetHeight.

I think we could have SetHeight and SetTimestamp if needed but usages are not the same.

WDYT ? @leohhhn

[thehowl]

overall lgtm