fix: debug_traceTransaction default param

[macfarla]

PR description

When reviewing docs PR 1909, claude picked up an inconsistency with default parameters when no params are supplied vs empty {} params - as described in #9787

Docs still needs correcting here to say disableMemory is true by default (all other booleans default to false) https://besu.hyperledger.org/public-networks/reference/api#debug_tracetransaction

Fixed Issue(s)

fixes #9787

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[usmansaleem]

LGTM

I have pushed more changes

[macfarla]

@lu-pinto can you review this one - the default param behavior is currently inconsistent between RPCs - this came up from looking at a docs PR hyperledger/besu-docs#1909 - in one spot we say the trace flags are all false by default but looking at the code that's not the case, and actually you currently get different behavior between passing no options and empty {} options

[lu-pinto]

nit: I know this was like this before but this name defaultTracerConfig could be misleading. At this stage these option are not default anymore, they are a mix of user set params and defaults, so probably would just call it tracerConfig

[lu-pinto]

Looks good, I think the default behavior for Geth is also to not show memory if not enabled. Make sense to align cases with empty params with no params at all