[OVEP] Fix to increase provider value upto 2048 characters

[jatinwadhwa921]

This pr fixes this issue https://jira.devtools.intel.com/browse/EISW-177113

[ankitm3k]

lgtm

[preetha-intel]

LGTM
As a follow up , can we move reshape_input and layout to config file as well?
As we see in this scenario where there are multiple inputs it gets tricky for the user to specify it as provider_option. As we have support for config file already it should be part of config making the user experience better.
@MayureshV1 Do you see it feasible to move the reshape_input and layout that are specific to OV model manipulations part of config file?