Make `ConfigOptions` easier to work with

[alamb]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
In order to use the ConfigOptions structure in more places, it was changed to be an Arc<RwLock<ConfigOptions>> by @waitingkuo in #3455 which is good

The usecase there was so that the configuration was owned by SessionContext but other parts could read it if necessary -- specifically, information_schema.df_settings / SHOW ALL initially.

I have been trying to consolidate these settings (see #3822) but find that working with ConfigOptions is somewhat of a pain (as you have to type Arc<RwLock> a bunch and then to update values you have to call read() and write()

Describe the solution you'd like

I would like to move the mutability handling into ConfigOption so this looks like

#[impl(Clone)]
struct ConfigOptions { 
  data: Arc<RwLock<...>>
}

And change all places in the code that use

Arc<RwLock<ConfigOptions>>

to

ConfigOptions

That would hide the details of shared ownership more nicely I think

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Came up here with @thinkharderdev : #3822 (comment)