Display schema and data for created and dropped tables in dolt diff command

[fulghum]

Fixes: #3300

The dolt diff command was previously omitting schema and data diffs if tables were created or dropped within the commit range, and only outputting diff summary information with tabular output. This change causes the schema changes and data changes to be included in tabular output.

Old behavior:

❯ dolt diff mhgva1kfcljign82ntcmr6ftmpbmemko j6n5727at9652tri8ncsa02v794h1fi4
diff --dolt a/a b/a
added table

❯ dolt diff mhgva1kfcljign82ntcmr6ftmpbmemko ccm9bfiv6jhft1tmeu1cqd0ghduhg4v7
diff --dolt a/a b/a
added table

❯ dolt diff qd507o2jjlckjgmn2polsmiifk62vo8n js1bb2cvdr7h4tdj2d3m33jhp9rc9ee9
diff --dolt a/a b/a
deleted table

New behavior:

❯ dolt diff mhgva1kfcljign82ntcmr6ftmpbmemko j6n5727at9652tri8ncsa02v794h1fi4
diff --dolt a/a b/a
added table
+CREATE TABLE `a` (
+  `n` int NOT NULL,
+  PRIMARY KEY (`n`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+-----+---+
|     | n |
+-----+---+
+-----+---+

❯ dolt diff mhgva1kfcljign82ntcmr6ftmpbmemko ccm9bfiv6jhft1tmeu1cqd0ghduhg4v7
diff --dolt a/a b/a
added table
+CREATE TABLE `a` (
+  `n` int NOT NULL,
+  PRIMARY KEY (`n`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+-----+---+
|     | n |
+-----+---+
|  +  | 1 |
|  +  | 2 |
+-----+---+

❯ dolt diff qd507o2jjlckjgmn2polsmiifk62vo8n js1bb2cvdr7h4tdj2d3m33jhp9rc9ee9
diff --dolt a/a b/a
deleted table
-CREATE TABLE `a` (
-  `n` int NOT NULL,
-  PRIMARY KEY (`n`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+-----+---+
|     | n |
+-----+---+
|  -  | 1 |
|  -  | 2 |
|  -  | 3 |
+-----+---+

[zachmu]

LGTM, just a couple small comments