Don't rewrite table data when changing enum/varchar/varbinary type to make it more permissive.

[nicktobey]

Sometimes a schema change can widen the set of valid column values without affecting the representation of any existing columns. Examples include:

• Adding a possible value to the end of an enum
• Increasing the length of a varchar/varbinary column.

In these cases, there's no need to rewrite the table, since every tuple is guaranteed to have the same representation it had before.

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
1772eac	ok	5937457

version	total_tests
1772eac	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
e6a8ab1	ok	5937457

version	total_tests
e6a8ab1	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
51969e8	ok	5937457

version	total_tests
51969e8	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
97ddfde	ok	5937457

version	total_tests
97ddfde	5937457

correctness_percentage
100.0

[coffeegoddd]

@coffeegoddd DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
3126479	ok	5937457

version	total_tests
3126479	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
10e558d	ok	5937457

version	total_tests
10e558d	5937457

correctness_percentage
100.0

[coffeegoddd]

@coffeegoddd DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
021a883	ok	5937457

version	total_tests
021a883	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
997bfef	ok	5937457

version	total_tests
997bfef	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
d3aaf30	ok	5937457

version	total_tests
d3aaf30	5937457

correctness_percentage
100.0