Fix a bad block during sync Baobab

[KimKyungup]

Proposed changes

Before this PR, bad block can be happened caused by the dereferenced missing trie node in low spec instances.
The missing trie node was dereferenced by the race condition of trieNodeCache reference count.

This PR added GCLock to prevent dereference during commit and reference.

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• Bugfix
• New feature or enhancement
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Further comments

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[KimKyungup]

I reproduced the issue with https://github.com/KimKyungup/klaytn/tree/badblock_test.
If dereference is executed between commit and reference of state or storage, the issue can be shown,
So this PR prevent dereference during the section.

[KimKyungup]

PTAL. @aidan-kwon @jeongkyun-oh @ehnuje @winnie-byun

[joowon-byun]

What does it mean 1 0 0 2 2 2 2 1 in your test code? :

// 1	0	0	2	2	2	2	1
testStorage := []byte{100,100,100,200,200,200,200, 100}

Did you tested like : testStorage := []byte{1,-1,0,2,0,0,0,0,-1} locally, or something?

[KimKyungup]

What does it mean 1 0 0 2 2 2 2 1 in your test code? :

// 1	0	0	2	2	2	2	1
testStorage := []byte{100,100,100,200,200,200,200, 100}

Did you tested like : testStorage := []byte{1,-1,0,2,0,0,0,0,-1} locally, or something?

It means the test data value to be set in the account's storage.
Ignore the commented value. :)

[joowon-byun]

LGTM :)

[ehnuje]

Will you add a TC for this PR?

[KimKyungup]

Will you add a TC for this PR?

No, I won't. :) This test code should change the main code. I think I don't need it.

[KimKyungup]

@ehnuje PTAL. :)