v2/consortium_test: fix for pbss: do not insert inserted blocks

[Francesco4203]

This PR is an alternative for #612

Before this PR, in TestIsPeriodBlock and TestIsTrippEffective, the chain of blocks is inserted while it still includes some previously inserted blocks, causing the below error when running on path scheme.

Potential reason:

• There are still logics for correctly handle inserting inserted blocks.
• However, in pathdb, the blocks older than 128 blocks are not directly retrievable from the layer tree, which are already capped to the disk layer. (there are 128 diff layers) => the parent of the being-inserted block cannot be retrieved for processing.
• In hashdb, the old blocks can still be retrieved from disk.
• Therefore, in this 2 tests, the number of blocks inserted are too large to be retrieve, causing the error.

This PR is to fix it by only inserting newly created blocks.

Run test before this PR

--- FAIL: TestIsTrippEffective (0.19s)
panic: triedb parent [0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421] layer missing [recovered]
        panic: triedb parent [0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421] layer missing

goroutine 4016 [running]:
testing.tRunner.func1.2({0x105c97d20, 0x140002d1770})
        /opt/homebrew/Cellar/go/1.22.3/libexec/src/testing/testing.go:1631 +0x1c4
testing.tRunner.func1()
        /opt/homebrew/Cellar/go/1.22.3/libexec/src/testing/testing.go:1634 +0x33c
panic({0x105c97d20?, 0x140002d1770?})
        /opt/homebrew/Cellar/go/1.22.3/libexec/src/runtime/panic.go:770 +0x124
github.com/ethereum/go-ethereum/consensus/consortium/v2.testIsTrippEffective(0x140000c3a00, {0x10592235d, 0x4})
        /Users/long.nguyen/Documents/GitHub/ronin/consensus/consortium/v2/consortium_test.go:2437 +0xe5c
github.com/ethereum/go-ethereum/consensus/consortium/v2.TestIsTrippEffective(0x140000c3a00)
        /Users/long.nguyen/Documents/GitHub/ronin/consensus/consortium/v2/consortium_test.go:2341 +0x40
testing.tRunner(0x140000c3a00, 0x105df9818)
        /opt/homebrew/Cellar/go/1.22.3/libexec/src/testing/testing.go:1689 +0xec
created by testing.(*T).Run in goroutine 1
        /opt/homebrew/Cellar/go/1.22.3/libexec/src/testing/testing.go:1742 +0x318
exit status 2
FAIL    github.com/ethereum/go-ethereum/consensus/consortium/v2 1.631s

Run test after this PR

PASS
ok      github.com/ethereum/go-ethereum/consensus/consortium/v2 1.530s

[huyngopt1994]

Could u added some comment explain related to max layers of Path base then we need to insert bs[:]?

[Francesco4203]

Added