Reduce build warnings

[dbwiddis]

Make the following changes to reduce the number of warnings seen on a gradle build:

• In formatter/formatting.gradle, indentWithSpaces is deprecated, use leadingTabsToSpaces
• Since ApiSpecFetcher, TenantAwareHelper, and WorkflowTimeoutUtility all use only static fields and methods, add a private no-arg constructor to prevent instantiating these classes
• In EncryptorUtils since DEFAULT_TENANT_ID is only used inside this class, make it private

[dbwiddis]

Hey @vAdyar I see you've submitted a PR for this! Thanks! Can you reply to this issue so I can assign it to you?

[vAdyar]

Created a PR for the above changes: #1051

[dbwiddis]

Thanks @vAdyar . Note I left a comment on your PR requesting changes.

@premdass I see from local commits you were going to try to tackle this too. If you'd like a different thing to work on, if you run ./gradlew test from the project root, you will get a file output of a "Problem Report" with a link. Mine looks like:

[Incubating] Problems report is available at: file:///Users/dbwiddis/git/flow-framework/build/reports/problems/problems-report.html

If you go to that report you'll see several lines in build.gradle marked with this error:

Space-assignment syntax in Groovy DSL has been deprecated.

Here's the description: https://docs.gradle.org/8.12.1/userguide/upgrading_version_8.html#groovy_space_assignment_syntax

So for all those lines, change any of the propertyName value syntax to one of:

propertyName = value
setPropertyName(value)
setPropertyName value
propertyName(value)

I prefer the top or bottom options. Consistency with the other settings around it is probably more important for readability.