[topgen] Support for parametrized inter-module signals

[Razer6]

This PR adds support for parametrized inter-module signals. Previously, when an inter-module signal depended on a parameter, you needed to specify the width value twice. Once for the parameter and once when the value is used for the width of the inter-module signal.

This PR fixes that and adds support for parameters being used for the width of an inter-module signal. When you want to do that, you need to expose the parameter. If local is set, the parameter will be created as localparam in the top-level file, and the interconnection uses that parameter. If local is false, a top-level parameter is created, but also a local parameter within the reg_pkg of the IP.

The PR is separated into 2 parts:

1. The infrastructure implemetnation
2. Using that feature for the KMAC NumAppIntf parameter

[andreaskurth]

LGTM except for one open thread and a formatting comment. Thx @Razer6!

[andreaskurth]

This array is declared in an "up to" (i.e., [0:KmacNumAppIntf-1]) manner, so to my understanding index 0 is for keymgr, index 1 for lc_ctrl, and index 2 for rom_ctrl -- which is equivalent to the previous definition in kmac_pkg. LGTM.

[andreaskurth]

CHANGE AUTHORIZED: hw/ip/kmac/data/kmac.hjson
CHANGE AUTHORIZED: hw/ip/kmac/rtl/kmac.sv
CHANGE AUTHORIZED: hw/ip/kmac/rtl/kmac_app.sv
CHANGE AUTHORIZED: hw/ip/kmac/rtl/kmac_pkg.sv
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/top_earlgrey.sv

These changes have no functional impact on Earlgrey.

[vogelpi]

CHANGE AUTHORIZED: hw/ip/kmac/data/kmac.hjson
CHANGE AUTHORIZED: hw/ip/kmac/rtl/kmac.sv
CHANGE AUTHORIZED: hw/ip/kmac/rtl/kmac_app.sv
CHANGE AUTHORIZED: hw/ip/kmac/rtl/kmac_pkg.sv
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/top_earlgrey.sv

These changes have no functional impact on Earlgrey. This is fine.