fix(connector): support deterministic datagen for random int/float

[tabVersion]

Signed-off-by: tabVersion tabvision@bupt.icu

What's changed and what's your intention?

PLEASE DO NOT LEAVE THIS EMPTY !!!

Please explain IN DETAIL what the changes are in this PR and why they are needed:

int and float generation supports deterministic results with given seed and offset (we xor seed and offset as new seed).

the prev impl gen a certain sequence with the given seed, but if we rebuild the source, datagen will output the sequence from the beginning rather than at the specific offset.

• Summarize your change (mandatory)
• How does this PR work? Need a brief introduction for the changed logic (optional)
• Describe clearly one logical change and avoid lazy messages (optional)
• Describe any limitations of the current code (optional)
  • varchar and timestamp datagen does not support deterministic gen
• Add the 'user-facing changes' label if your PR contains changes that are visible to users (optional)

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

helps #3039

[shanicky]

LGTM