[Bug][Manager] Incorrect logic in input validation

[flowers-59f]

Description

Bug Fix

• Incorrect logic : It used isNotBlank which caused the program to error out when the input was actually valid.
• The fix : Changed isNotBlank to isBlank.

// Before
if (StringUtils.isNotBlank(input)) {
    System.err.println("input cannot be empty, for example: inlongGroupId:test_group");
    return;
}
// After
if (StringUtils.isBlank(input)) {
    System.err.println("input cannot be empty, for example: inlongGroupId:test_group");
    return;
}

InLong Component

InLong Manager

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct