test: resolve `.skip` and `TODOs` tests in LSP6 + LSP7 #2099

Job	Run time
build	3m 53s
test-suites (up)	46s
test-suites (upinit)	1m 11s
test-suites (lsp1)	2m 40s
test-suites (lsp2)	37s
test-suites (lsp4)	26s
test-suites (lsp6)	3m 18s
test-suites (lsp6init)	3m 28s
test-suites (lsp7)	1m 30s
test-suites (lsp7init)	2m 35s
test-suites (lsp8)	2m 3s
test-suites (lsp8init)	2m 35s
test-suites (lsp9)	1m 0s
test-suites (lsp9init)	1m 3s
test-suites (lsp11)	50s
test-suites (lsp11init)	53s
test-suites (lsp17)	29s
test-suites (lsp20)	2m 5s
test-suites (lsp20init)	3m 43s
test-suites (lsp23)	43s
test-suites (universalfactory)	27s
test-suites (reentrancy)	2m 20s
test-suites (reentrancyinit)	2m 45s
test-suites (mocks)	28s
	41m 48s

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