sql: make sequence integer bound consistent with default_int_size

[ZhouXing19]

This PR is based on #84034.
Please just look at the 2nd commit. I'll rebase this PR once #84034 is merged.

Previously, the default bounds of sequence are alwaysmath.MaxInt64
or math.MinInt64 (depending on the sequence's order). This
can be inconsistent with the cluster setting default_int_size. This commit
is to fix it.

fixes #84554

Release note (bug fix): make sequence integer bound consistent with the
cluster setting default_int_size.

Release justification: fix a bug of sequence integer bound

[cockroach-teamcity]

This change is 

[ZhouXing19]

Note to myself: do we need a migration for this?

[ajwerner]

Note to myself: do we need a migration for this?

What would the migration do?

Reviewable status: complete! 0 of 0 LGTMs obtained

[rafiss]

this seems like it lgtm after rebasing

[ZhouXing19]

Note to myself: do we need a migration for this?

What would the migration do?

Reviewable status: complete! 0 of 0 LGTMs obtained

nvm, I misunderstood. I thought we needed to reset the existing sequences' min and max values, but it doesn't seem needed.

[ZhouXing19]

Rebased and it passed the CI. RFAL, thanks!

[rafiss]

just a small nit!

Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @rafiss and @ZhouXing19)

---

pkg/sql/information_schema.go line 486 at r5 (raw file):

				identityMax := tree.DNull
				identityMin := tree.DNull
				generatedAsIdentitySeqOpt, err := column.GetGeneratedAsIdentitySequenceOption(p.SessionData().DefaultIntSize)

in this case, i think we should not use the session variable, and should instead inspect the int size from the column type. e.g. pass in column..GetType().Width()

otherwise, the result shown in information_schema.columns would depend on the session var.

CREATE TABLE t (id1 INT GENERATED BY DEFAULT AS IDENTITY);

select identity_maximum from information_schema.columns where table_name = 't' and column_name='id1';

set default_int_size = 4;

select identity_maximum from information_schema.columns where table_name = 't' and column_name='id1';

we'd want the two selects to return the same value

[ZhouXing19]

in this case, i think we should not use the session variable, and should instead inspect the int size from the column type. e.g. pass in column..GetType().Width()

Makes sense. Made the change and updated the tests.

[rafiss]

lgtm, nice!

Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @rafiss and @ZhouXing19)

[ZhouXing19]

TFTR!
bors r=rafiss

[craig]

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[ZhouXing19]

bors r+

[craig]

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