Return DBActions from Complete

[kvch]

This PR changes the signature of Complete. From now on, it returns a list of DBActions.

I am transforming Rollback and Start calls in upcoming PRs. Once all the migration phases are refactored, I am adding coordination between the operations to eliminate unnecessary steps and invalid actions sequences (like trying to rename a duplicated column multiple times).

[github-actions]

Merging this branch changes the coverage (1 decrease, 1 increase)

Impacted Packages	Coverage Δ	🤖
github.com/xataio/pgroll/pkg/migrations	75.29% (+0.68%)	👍
github.com/xataio/pgroll/pkg/roll	79.64% (-0.43%)	👎

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/xataio/pgroll/pkg/migrations/migrations.go	94.12% (ø)	17	16	1
github.com/xataio/pgroll/pkg/migrations/op_add_column.go	85.34% (+4.36%)	116 (-26)	99 (-16)	17 (-10)	👍
github.com/xataio/pgroll/pkg/migrations/op_alter_column.go	86.49% (+2.75%)	111 (-12)	96 (-7)	15 (-5)	👍
github.com/xataio/pgroll/pkg/migrations/op_change_type.go	92.86% (ø)	14	13	1
github.com/xataio/pgroll/pkg/migrations/op_create_constraint.go	81.42% (+3.26%)	113 (-6)	92 (-1)	21 (-5)	👍
github.com/xataio/pgroll/pkg/migrations/op_create_index.go	69.35% (ø)	62	43	19
github.com/xataio/pgroll/pkg/migrations/op_create_table.go	83.97% (ø)	131	110	21
github.com/xataio/pgroll/pkg/migrations/op_drop_column.go	78.12% (+1.38%)	32 (-11)	25 (-8)	7 (-3)	👍
github.com/xataio/pgroll/pkg/migrations/op_drop_constraint.go	84.00% (+4.00%)	50 (-15)	42 (-10)	8 (-5)	👍
github.com/xataio/pgroll/pkg/migrations/op_drop_index.go	90.91% (ø)	11	10	1
github.com/xataio/pgroll/pkg/migrations/op_drop_multicolumn_constraint.go	86.57% (+4.07%)	67 (-13)	58 (-8)	9 (-5)	👍
github.com/xataio/pgroll/pkg/migrations/op_drop_not_null.go	93.33% (ø)	15	14	1
github.com/xataio/pgroll/pkg/migrations/op_drop_table.go	86.96% (-0.54%)	23 (-1)	20 (-1)	3	👎
github.com/xataio/pgroll/pkg/migrations/op_raw_sql.go	88.89% (ø)	18	16	2
github.com/xataio/pgroll/pkg/migrations/op_rename_column.go	93.33% (ø)	30	28	2
github.com/xataio/pgroll/pkg/migrations/op_rename_constraint.go	100.00% (ø)	16	16	0
github.com/xataio/pgroll/pkg/migrations/op_rename_table.go	100.00% (ø)	15	15	0
github.com/xataio/pgroll/pkg/migrations/op_set_check.go	86.96% (+2.34%)	23 (-3)	20 (-2)	3 (-1)	👍
github.com/xataio/pgroll/pkg/migrations/op_set_comment.go	90.00% (ø)	10	9	1
github.com/xataio/pgroll/pkg/migrations/op_set_default.go	85.71% (ø)	21	18	3
github.com/xataio/pgroll/pkg/migrations/op_set_fk.go	75.00% (+0.71%)	32 (-3)	24 (-2)	8 (-1)	👍
github.com/xataio/pgroll/pkg/migrations/op_set_notnull.go	86.36% (+5.72%)	22 (-9)	19 (-6)	3 (-3)	👍
github.com/xataio/pgroll/pkg/migrations/op_set_replica_identity.go	100.00% (ø)	21	21	0
github.com/xataio/pgroll/pkg/migrations/op_set_unique.go	77.27% (ø)	22	17	5
github.com/xataio/pgroll/pkg/roll/execute.go	78.57% (-0.82%)	168 (+3)	132 (+1)	36 (+2)	👎

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.