Extend -init_debug to print module loading commands

[cflicker]

391ed66 (#6685) added printing of timing for the path setting commands:

{progress,preloaded}
{path,["$ROOT/lib/kernel-9.2/ebin","$ROOT/lib/stdlib-5.2/ebin"]}
{done_in_microseconds,224}
{progress,kernel_load_completed}
{path,["$ROOT/lib/kernel-9.2/ebin"]}
{done_in_microseconds,213}
{path,["$ROOT/lib/stdlib-5.2/ebin"]}
{done_in_microseconds,186}
...

However, since module loading comprises a significant portion of the boot script time, it would be helpful to include timings for module loading as well.
Therefore, this commit also adds the module loading commands to the -init_debug output:

{progress,preloaded}
{path,["$ROOT/lib/kernel-9.2/ebin","$ROOT/lib/stdlib-5.2/ebin"]}
{done_in_microseconds,447}
{primLoad,[error_handler,application,application_controller,application_master,code,code_server,erl_eval,erl_lint,erl_parse,error_logger,ets,file,filename,file_server,file_io_server,gen,gen_event,gen_server,heart,kernel,logger,logger_filters,logger_server,logger_backend,logger_config,logger_simple_h,lists,proc_lib,supervisor]}
{done_in_microseconds,78379}
{progress,kernel_load_completed}
{path,["$ROOT/lib/kernel-9.2/ebin"]}
{done_in_microseconds,126}
{primLoad,[application_starter,auth,disk_log,disk_log_1,disk_log_server,disk_log_sup,dist_ac,dist_util,erl_boot_server,erl_compile_server,erl_ddll,erl_distribution,erl_epmd,erl_erts_errors,erl_kernel_errors,erl_reply,erl_signal_handler,erpc,erts_debug,gen_sctp,gen_tcp,gen_tcp_socket,gen_udp,gen_udp_socket,global,global_group,global_search,group,group_history,inet,inet6_sctp,inet6_tcp,inet6_tcp_dist,inet6_udp,inet_config,inet_db,inet_dns,inet_epmd_dist,inet_epmd_socket,inet_gethost_native,inet_hosts,inet_parse,inet_res,inet_sctp,inet_tcp,inet_tcp_dist,inet_udp,kernel_config,kernel_refc,local_tcp,local_udp,logger_disk_log_h,logger_formatter,logger_h_common,logger_handler_watcher,logger_olp,logger_proxy,logger_std_h,logger_sup,net,net_adm,net_kernel,os,pg,pg2,prim_tty,ram_file,raw_file_io,raw_file_io_compressed,raw_file_io_deflate,raw_file_io_delayed,raw_file_io_inflate,raw_file_io_list,rpc,seq_trace,socket,standard_error,user_drv,user_sup,wrap_log_reader]}
{done_in_microseconds,87934}
{path,["$ROOT/lib/stdlib-5.2/ebin"]}
{done_in_microseconds,253}
{primLoad,[argparse,array,base64,beam_lib,binary,c,calendar,dets,dets_server,dets_sup,dets_utils,dets_v9,dict,digraph,digraph_utils,edlin,edlin_context,edlin_expand,edlin_key,edlin_type_suggestion,epp,erl_abstract_code,erl_anno,erl_bits,erl_compile,erl_error,erl_expand_records,erl_features,erl_internal,erl_posix_msg,erl_pp,erl_scan,erl_stdlib_errors,erl_tar,error_logger_file_h,error_logger_tty_h,escript,eval_bits,file_sorter,filelib,gb_sets,gb_trees,gen_fsm,gen_statem,io,io_lib,io_lib_format,io_lib_fread,io_lib_pretty,log_mf_h,maps,math,ms_transform,orddict,ordsets,otp_internal,peer,pool,proplists,qlc,qlc_pt,queue,rand,random,re,sets,shell,shell_default,shell_docs,slave,sofs,string,supervisor_bridge,sys,timer,unicode,unicode_util,uri_string,win32reg,zip]}
{done_in_microseconds,137688}
...

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CT Test Results

    3 files    140 suites   45m 57s ⏱️
1 576 tests 1 526 ✅ 50 💤 0 ❌
2 088 runs  2 019 ✅ 69 💤 0 ❌

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[garazdawi]

Thanks!